Staybolt structure



R. S. MENNIE STAYBOLT STRUCTURE. MPLICAHON FILED AUG.29, 1919.

Patented Nov. 1, 1921.

UNITED STATES PATENT OFFICE.

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STAYBOLT STRUCTURE Patented Nov. 1, 1921.

Original application filed February 5, 1916, Serial No. 76,333. Divided and this application filed August 29, 1919. Serial No. 320,648.

To all whom it may concern:

Be it known that 1, ROBERT S. MENNIE, a citizen of Canada, and a resident of Chicago, in the county of Cook and State 'of Illinois, have invented certain new and useful Improvements in Staybolt Structuresand I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention relates to improvements in staybolt structures, this application being a division of application for patent filed by me on the 5th day of February, 1916, and designated by Serial Number 76,333.

The object of my present invention is to provide a flexible staybolt structure of the type embodying a sleeve or bushing in which t e head of the staybolt is mounted, which shall be simple in. construction, which may be quickly and effectively installed, and in which a closure for the sleeve shall be integrally united to the latter and said sleeve integrally united to the boiler sheet.

By integrally uniting as by welding very important defects in present practice are eliminated. Threaded sleeves and caps become leaky and must be removed eventually, whereas 'a sleeve or cap integrally united eliminates leakage.

With this and other objects in view,' the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claims.

In the accompanying drawings, Figure 1 is a sectional view of a staybolt structure showing one embodiment of my invention, and Figs. 2, 3 and 4 are views of modiflcations.

1 represents the outer sheet of a boiler l'lZlV' ing an opening 2 which in the embodiment of the invention shown in Fig. 1 is of uniform diameter from the outer to the inner face of the sheet and therefore presents :1 straight wall.

A bearing sleeve 3 ,msses through tho opening 2 and projects inwardly beyond the inner face of the boil r sheet, said sleeve be ing (in the embornncnt of the invention shown in .=ig. 1) cylindrical in form having an external diameter which is uniform ap proximately from one end to the other. The

bore of the sleeve is made tapering and curved throughout aportion of the sleeve and affords a seat or bearing for the rounded head 4 at the outer end of a staybolt 5. The bearing sleeve 3 is provided at its outer end with a shoulder or narrow annular flange 6 which overlies the outer face of the boiler sheet and sustains such inward pull "as may be exerted on the sleeve b the staybolt. The peripheral portion 0 the shoulder or annular flange 6 is integrally united to theboiler sheet by means of a weld 7. The inte ral union effected between the sleeve and tfie boiler sheet not onl rigidly secures the sleeve to the boiler s eat but it also serves to prevent leakage past said sleeve.

' A closure 9 is located within the outer end portion of the sleeve3 over the bolt head and this closure is fixedly and integrally united to the sleeve by a. weld 10 located within the sleeve and around the edge portion of said closure. The closure thus seals the outer end of the sleeve and prevents leakage of any steam which might find its way past the bolt head. The bolt may be provided with a tell-tale hold 11 which may extend from end to end of the bolt and 'closed in the headed end by a permanent plug 12.

In the form of the invention shown in Fig. 2, a conical bearing sleeve 13 is shown passing through a conical opening 14 in the boiler sheet. In the construction shown in Fig. 2, the annular flange at the outer end of the sleeve is omitted, but the sleeve projects outwardly beyond the outer face of the boiler sheet, as at 15, and is integrally united to the latter by a weld 16.

The construction shown in Fig. 3 is similur to that shown in Fig. 2, except that the closure for the sleeve is removable, being made in the form of a plug 17 screwed into the outer end of the sleeve, and the construction shown in,Fig. 4 is similar to that shown in Fig. 1 except that a plug 18 screwed into the outer end of the sleeve constitutes a removable closure for the sleeve.

in all the forms of the invention, the sleeve is so mounted in the boiler sheet as to resist inward pull of the staybolt and said sleeve projects beyond the outer face of the boiler sheet and is integrally united to the latter by welding.

Having fully described my invention what I claim as new and desire to SEt'HI'C by Let ters-Patent. is:-

I. In a stayholt striu-ture. the eoinliination with a boiler sheet having an opening. of a bearing sleeve passing through said opening and extending inwardti he vond the same and prevented from inward movement h v engagement with the hoiler sheet. said sleeve also projecting beyond the outer taee of the boiler sheet. a \veld surrounding the out wardly projeeting end of the sleeve and uniting said sleeve to the l)t)lltl' sheet. a stavliolt having a head mounted in said sleeve. and It elosure in the sleeve over the bolt head.

2. In a sta vholt strut-tore. the eoinhination with a lJUllll sheet having an opening. of a hearing sleeve passing through and in- \vardl beyond Said hoih-r sheet and prevented troni inward movement by engagement with the same. said sleeve also ]H'njeeting outwardly beyond said sheet. a weld integrally uniting the outwardly projeeting end of the sleeve to the hoiler sheet. a rlosure within said sleeve. :1 weld integrall v'uniting said elosure to the sleeve. and a stayholt hav ing a head mounted in said sleeve.

3. In a staybolt structure, the combination with a boiler sheet having an opening. of a.

hearing sleeve passing through said opeir ing and projecting inwardly beyond the same and provided at its outer end with a shoulder overlying the outer face of the boiler sheet. a weld integrally uniting the peripheral portion of said shoulder to th. hoiler sheet, a stayholt having a head inounted in said sleeve. and means elosing the outer end of the sleeve over the holt head.

4. in a stayliolt strneture. the eoinhination with a holler sheet having an opening. at a hearing sleeve passing through said opening and projerting inwardly beyond the same. said sleeve having a shoulder at its outer end overlying the outer t'aee ot the boiler sheet and \velded to the latter. a stayliolt having a head mounted in said sleeve. and a closure welded in lhe outer end of the sleeve.

In testimony whereof. I have signed this speeitieation in the presenee of two subscriblng witnesses.

ROBERT h. MI'L NIE.

Witnesses:

I5. I). Qlaeousox, J. B. FLETCHER. 

